Transmission-line device



March 11,1930. N. A. WAHLBERG TRANSMISSION LINE DEVICE Filed Aug. 11, 1927 v INVENTOR /\//'/5 A, WOh/b/ d Patented Mar. 11, 1930 UNITED STATES PATENT OFFICE me A. WAELBERG, OF WILKINSBUBG, PENNSYLVANIA, ASSIGNOB TO WESTINGHOUSE ELECTRIC 8a KANUFACTUBING COMPANY, A CORPORATION OF PENNSYLVANIA TRANSMISSION-LINE DEVICE Application filed August 11, 1927. Serial 1%. 212,195.

My invention relates to transmission-line devices and particularly to electrostatic-fieldcontrolling means, such as arcing rings, for association with suspension clamps.

l One object of my invention is to provide a device of the above-indicated character that shall comprise a single means for clamping a conductor and mounting an electrostatic field-controlling element relative thereto.

1 Another object of my invention is to provide an electrostatic shielding ring that shall have relatively great surface area on longitudinal sides surrounding a suspension clamp.

Another object of my invention is to pro vide a field-control ring that shall comprise few parts and that shall greatly facilitate its manufacture and assembly.

Another object of my invention is to provide a fieldrontrol or arcing-ring device that may be readily mounted in operative position around an insulator, while the is mounted in operative relation to a conductor and to a supporting tower with which is associated.

Another object of my invention is to pro vide a field-control ring that shall be simple and durable in construction, economical to manufacture and effective in its operation.

m In high=voltage insulator practice,

usual to mount an annular or ring-like electrostatic-field-controlling device around the insulator for keeping ultimate arc-over free of the dielectric parts.

However, as simple as a ring with inward 1y extending supporting arms may seem to be in this field, by reason of its relatively great diameter, compared to the cross-section of the stock from which it is constructed, and because of the effects of the service for which it is adapted, an entirely satisfactory and efl'ective ring of this character and for this service is sometimes diflicult and expensive to manufacture.

Violent vibrations of the line may so distort or displace the arc-assuming portion of the ring as to render it useless, if not detrimental to the line.

Adjacent metal parts, such as the ends of projecting lugs, pins and bolts, also some times interfere with the operation of the rlngs by causing greater concentration at local points thereon or by attracting the field away therefrom.

Further, where the parts of such a ring are permanently and integrally united, the insulator around which it is to be mounted must be detached. from the tower or conductor, with which it is associated, for the reception of the ring.

It is my aim to overcome all of the abovementioned objections, and, accordingly, in practicing my invention, I provide a structhat is constructed of simple sheet material elements that are adapted for mounting on a suspension clamp by the clamping means thereof, and that has other features of advantage to materially facilitate and economize its manufacture, cause it be self-braced against distortion, render its assembly and mounting, simple and expeditious operations and permit it to effectively shield the clamp.

Figure 1 of the accompanying drawings is a side view, partially in elevation and partially in section, of a device constructed in accordance with my invention, and

2 is a top plan View of the device shown in Fig. l.

A clamp 2, of the usual well known construction, comprises a conductor-receiving or channel portion 3 having an upwardly extending suspension or clevis portion a there on, clamping shoe member 6 and d-bolts 7 and 8 or equivalent fastening means for 1i glamping a conductor 9 in the channel mom- An electrostatic-field-controlling device 10, of my invention, comprises an annular element 12 constructed of half sections of sheet material of substantialy uniform cylin drical shape, and of relatively great width or height to efiectively cover or enclose the clamp 52.

A supporting member 15, also constructed of sheet material of relatively great width and area, is constructed to be of substantially U-shape, having free ends or legs 16, substantially conforming to the inner cylindrical surfaces of the element 12, and an apertured intermediate portion 17 for mounting on the channel member 3, b the bolts 7.

The legs 16 are preferably isposed with their upper edges below the up er edges of the element 12 and the outer sur aces thereof against the inner surfaces of the adjacent halves 14. The element 12 and the member 15 are preferably of sufiicient width to readil adapt the structure for the reception of a phlrality of standard bolts 18 well within the edges of the members 14 and 15 for holding the same together.

In the above-described structure, constructing the elements 14 and 15 of simple sheet stock, and connecting them to each other and to the clamp 2 by the standard bolts 7 and 18, renders the device of extremely simple and economical manufacture, reduces the number of parts to substantially a minimum and renders assembly and mounting of the device extremely easy.

By having the half portions 14 detachably secured to the supporting member 15 in the manner shown, the device may be readily mounted on the clamp 2, while the latter is mounted in operative position on an insulator.

While I have shown and described a particular form of my invention, changes may be effected therein without departing from the spirit and scope thereof as set forth in the appended claims.

I claim as my invention:

1. In a transmission-line device, the combination with a clamp including a conductorreceiving member and a member for clamping the conductor relative thereto, of an electrostatic-field-controlling element comprising a multi-part arc-assuming member and a member held in position by said clamping member for holding said arc-assuming parts together.

2. In a transmission-line device, the combination with a clamp including a conductorreceivin member and a member for clamping the con uctor relative thereto, of an electrostatic-field-controlling element comprisin a halved annular arc-assuming member an a member held in position on the clamp by said clamping member and secured to each of said halves for holding the same together.

3. In a transmission-line device, the combination with a clamp including a conductorreceiving channel member and a plurality of bolts for clamping the conductor relative thereto, of an electrostatic-field-controlling element comprising a halved annular arc-assumin member and a sup orting. member secure to the channel meml ier by said bolts and secured to each of said halves in removable relation to one thereof.

4. A transmission-line device comprisin an arc-assuming element of sheet material 0 substantially uniform cylindrical shape and an independently-formed supporting member therefor of sheet material extending between, and secured to, substantially diametrically-opposite positions thereon.

5. A transmission-line device comprisin an arc-assuming element of sheet material 0 substantially uniform cylindrical shape and an independently-formed su porting member therefor of sheet material of substantially U-shape extending between and secured to substantiall diametrically-opposite positions thereon, t e legs of the U being shaped to substantially conform to the cylindrical side surfaces of the annular arc-assuming element.

6. A transmission-line device comprisin an arc-assumin element of sheet material 0 longitudinallyalved substantially uniform cylindrical shape and an independentlyform'ed supporting member therefor of sheet material of substantially U-shape extending parallel to the diameter dividing said halves and having each of its free ends secured to adjacent ends of said halves.

7. A transmission-line device comprising an arc-assuming element of sheet material of longitudinally-halved substantially uniform cylindrical shape and an independentlyformed supporting member therefor of sheet material of substantially U-shape extending parallel to the diameter dividing said halves and having each of its free ends secured to the sides of adjacent ends of said halves.

8. A transmission-line device comprising an arc-assuming element of sheet material of longitudinally-halved substantially uniform cylindrical shape and an independentlyformed supporting member therefor of sheet material of substantially U-shape extending parallel to the diameter dividin said halves and having each of its free en 5 secured to inner sides of adjacent ends of said halves below the upper edges thereof.

In testimony whereof, I have hereunto subscribed my name this 4th day of August, 1927.

NILS A. WAHLBERG. 

